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Dark black in-ear wireless earbuds with stem design and charging case

No Sew

No Sew BK01-001 Wireless Earbuds Bluetooth 5.4 90h

SKU CH-078B-JR881

Bluetooth 5.4 in-ear buds deliver 90 hours of playtime, 14 mm graphene drivers with 85% deeper bass, ENC microphones cutting 80% background noise, 0.1 s latency and 15 m range

  • TypeIn-Ear
  • ColorDark Black
  • THDIn Ear
  • Power Supplybattery, a, aa, true
  • Ear CouplingSingle Ear
  • Cord LengthUser Manual
  • 14 mm graphene drivers and composite diaphragm deliver 85 % deeper bass for immersive Hi-Fi sound
  • ENC microphones cut 80 % of background noise so calls stay crystal clear in busy places
  • Bluetooth 5.4 gives 0.1 s latency, 15 m range and 50 % fewer drop-outs for stable streaming
  • 90 hours total playtime with two-hour charge keeps music going all week
  • IPX7 rating plus 360 ° balanced fit and three tip sizes handle sweat, rain and long sessions

True Wireless Earbuds for Everyday Use

The No Sew BK01-001 earbuds use Bluetooth 5.4 to deliver a cable-free listening experience for commuting, workouts and office calls. They suit anyone who wants long playback without daily charging and clear voice pickup during meetings.

Battery Life and Stable Connection

The charging case provides 90 hours of total operating time and recharges in 2 hours. Bluetooth 5.4 offers 0.1s latency, a 15m range and 50% fewer interruptions, while automatic pairing connects instantly when the case is opened.

Driver Sound and Call Clarity

14mm graphene drivers with a three-layer composite diaphragm produce 85% deeper bass for richer stereo. ENC microphones reduce background noise by 80% so voices stay clear on calls. Touch controls handle playback and volume, and IPX7 protection resists sweat and rain.

Highlights

  • 14 mm graphene drivers and composite diaphragm deliver 85 % deeper bass for immersive Hi-Fi sound
  • ENC microphones cut 80 % of background noise so calls stay crystal clear in busy places
  • Bluetooth 5.4 gives 0.1 s latency, 15 m range and 50 % fewer drop-outs for stable streaming
  • 90 hours total playtime with two-hour charge keeps music going all week
  • IPX7 rating plus 360 ° balanced fit and three tip sizes handle sweat, rain and long sessions

Specifications

BrandThunelec
ModelBK01, BK01-001
Part NumberBK01-001
TypeIn-Ear
ColorDark Black
THDIn Ear
Power Supplybattery, a, aa, true
Ear CouplingSingle Ear
Cord LengthUser Manual
Battery90 hours
Operating Time90 hours
Charge Time2 hours
Contains Embedded Batterybattery
Features90 hours, application, Wireless, In Ear, BK01 Wireless Earbuds *2
Package ContentsBK01 Wireless Earbuds *2, Cable, User Manual, Eartip

Questions about this item

How do I pair the earbuds and what step do people miss?

Open the charging case and the earbuds enter pairing mode automatically via Bluetooth 5.4; the step users miss is ensuring the case itself has charge before opening it.

What will need replacement first with daily use?

The silicone ear tips in three sizes will wear or lose seal before the internal battery; the IPX7 rating protects the electronics from sweat and rain.

What limit appears first during a long listening session?

The 90-hour total playback limit across the case and buds is reached before the 15-metre Bluetooth 5.4 range or 0.1-second latency become factors.

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